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Real-Time Visual Monitoring of Kinetically Controlled Self-Assembly.

Zizhao Huang1, Tao Jiang1, Jie Wang1

  • 1Key Laboratory for Advanced Materials and Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Meilong Road 130, Shanghai, 200237, P. R. China.

Angewandte Chemie (International Ed. in English)
|October 24, 2020
PubMed
Summary
This summary is machine-generated.

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Researchers monitored chiral molecule self-assembly using vibration-induced emission, observing distinct optical and morphological changes. This dynamic supramolecular chemistry approach allows real-time tracking of molecular aggregation and conformational shifts.

Area of Science:

  • Supramolecular Chemistry
  • Materials Science
  • Organic Chemistry

Background:

  • Hierarchical self-assembly of artificial structures is key in dynamic supramolecular chemistry.
  • Monitoring self-assembly dynamics provides insights into material formation.
  • Chiral molecules offer unique properties for advanced material design.

Purpose of the Study:

  • To investigate the complex self-assembly dynamics of chiral N,N'-diphenyl dihydrodibenzo[a,c]phenazine (DPAC) derivatives.
  • To monitor the self-assembly process in real-time using optical spectrometry.
  • To correlate molecular aggregation and conformational changes with observed optical and morphological characteristics.

Main Methods:

  • Utilized vibration-induced emission (VIE) for ratiometric fluorescence monitoring.
Keywords:
circularly polarized luminescencekinetic trapsself-assemblyvibration-induced emissionvisual monitoring

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  • Employed optical spectrometry for real-time tracking of the self-assembly process.
  • Analyzed changes in optical and morphological characteristics during self-assembly.

    • Main Results:

    • Observed distinct optical and morphological characteristics for different DPAC assemblies.
    • Successfully monitored the self-assembly from kinetic traps to thermodynamic equilibrium.
    • Induced strong circularly polarized luminescence (glum =1.6×10-2) during morphology transformation from particles to nanobricks.
    • Established a link between molecular aggregation, conformational change, and self-assembly behavior.

    Conclusions:

    • Dynamic supramolecular chemistry enables the construction and monitoring of complex artificial structures.
    • Chiral DPAC derivatives exhibit controllable self-assembly with tunable optical properties.
    • Real-time monitoring via VIE fluorescence provides effective insights into sophisticated self-assembly processes.